Fluorescent Pseudomonas isolate E11.3 as biocontrol agent for Pythium root rot in tulips

Weststeijn, Emma A.

doi:10.1007/bf02000168

Cited by 19 publications

(8 citation statements)

References 28 publications

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“…[Martin and Hancock, 1987;Paulitz and Baker, 1987] and fluorescent Pseudomonas spp. [Callan et al, 1990;Howell and Stipanovic, 1980;Osburn et al, 1989;Parke et al, 1991;Weller and Cook, 1988;Weststeijn, 1990]. The biotests described in this paper will allow rapid screening for effective control methods based on the application of fungicides or biopesticides.…”

Section: Discussionmentioning

confidence: 94%

“…are consistently isolated in soilless culture of tomato and cucumber even from apparently healthy root systems. The pathogenicity of such unidentified Pythium isolates is still unclear, while the pathogenicity of easily identified species such as P. aphanidermatum or P. ultimum has been extensively studied ] Bates and Stanghellini, 1984;Ch6rif and B61anger, 1992;Favrin et al 1988;Nelson and Craft, 1991;Weststeijn, 1990]. The purpose of our study was to characterize the pathogenicity of 39…”

Section: Discussionmentioning

confidence: 99%

“…cause mainly damping-off diseases of seedlings of many plant species [Hendrix and Campbell, 1973;Van Der Plaats-Niterink, 1981], they also can cause severe root rot on mature plants such as sugarcane [Lee and Hoy, 1992], turfgrasses [Nelson and Craft, 1991], geranium [Chagnon and B61anger, 1991] and tulips [Weststeijn, 1990] grown in soil. Root rot is especially important in hydroponics and rockwool cultures of tomato [Jenkins and Averre, 1983], cucumber [Ch6rif and B61anger, 1992;Favrin et al, 1988;Jenkins and Averre, 1983;Stanghellini et al, 1988], spinach Gold and Stanghellini, 1985] and lettuce [Funck-Jensen andHockenhull, 1983, Jenkins andAverre, 1983;Stanghellini and Kronland, 1986], in which the fungus can spread easily with the nutrient solution.…”

Section: Introductionmentioning

confidence: 99%

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Pathogenicity ofPythium species on cucumber in peat-sand, rockwool and hydroponics

Moulin¹,

Lemanceau²

1994

Eur J Plant Pathol

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Abstract. Pythium spp. that cause damping-off of seedlings also can cause root rot of older plants and lead to yield reductions. This can be especially severe in soilless cultures where the fungus can spread easily with the nutrient solution. 39 Pythium isolates obtained from discolored roots were assayed for their ability to cause damping-off on cucumber seedlings in sand-peat and for their pathogenicity in soilless culture of cucumber in rockwool or hydroponic solution. Isolates of Pythium aphanidermatum, P. irregulare, P. sylvaticum and P. ultimum were highly pathogenic in sand-peat, but only P. aphanidermatum strains were pathogenic in soilless conditions and led to root decay, plant death in rockwool culture and growth reduction in hydroponic culture. One strain of P. aphanidermatum significantly reduced the yield of cucumber grown in rockwool under conditions similar to those of commercial cultures.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pathogenicity ofPythium species on cucumber in peat-sand, rockwool and hydroponics

Moulin¹,

Lemanceau²

1994

Eur J Plant Pathol

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“…The liquid assay technique was a simple method for isolation of bacteria. Fluorescent Pseudomonas from Pythiumdiseased tulip roots was isolated by extraction of infected root in sterilized water (Weststeijn 1990).…”

Section: Introductionmentioning

confidence: 99%

Antagonistic Bacteria Against Schizophyllum Commune Fr. In Peninsular Malaysia

et al. 2006

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Schizophyllum communeFr., is one of the important fungi, causes brown germ and seed rot of oil palm. Biodiversity of antagonistic bacteria from oil palm plantations in Peninsular Malaysia is expected to support in development of biopesticide. Isolation with liquid assay and screening antagonistic bacteria using dual culture assay were carried out in the bioexploration. A total of 265 bacterial isolates from plant parts of oil palm screened 52 antagonistic bacterial isolates against 5. commune. Bacterial isolates were identified by using Biolog* Identification System i.e.

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“…Recently, we demonstrated under near-commercial conditions that infestation of the growing substrate (rockwool) with P. aphanidermatum strain OP4 caused significant yield losses of cucumber (Moulin et al, 1994a), Application of mierobial antagonists such as fluorescent pseudomonads is a promising method of controlling this disease. Fluorescent Pseudomonas spp, suppress Pythium root rot ofwheat (Weller and Cook, 1986), tulip (Weststeijn, 1990), and cucumber (Paulitz et al, 1992, Moulin et al,, 1994b. Yield losses of cucumber caused by P. aphanidermatum OP4 can be avoided by the inoculation of a selected strain of fluorescent pseudomonad (CH31) (Moulin et al,, 1994b),…”

Section: Introductionmentioning

confidence: 99%

Suppression of Pythium Root Rot of Cucumber by a Fluorescent Pseudomonad s Related to Reduced Root Colonization by Pythium Apbanidermatum

Moulin

Lemanceau

Alaboutte

1996

Journal of Phytopathology

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Root colonization of cucumber with P aphanidermatum OP4 was examined in the absence and in the presence of either fluorescent pseudomonad strain CH31 or strain CHI. Quantification was performed by antigen‐coated plate enzyme‐linked immunosorbent assay (ACP‐ELISA) using an antiserum obtained from a rabbit immunized with zoospore cysts: this antiserum did not cross‐react with non‐infested roots of cucumber, or with the fluorescent pseudomonads CH31 and CHI. Application of the previously developed biotest enabled us to assess the ability of the two strains of fluorescent pseudomonad to suppress root rot caused by P. aphanidermaium OP4. At all bacterial densities tested, the fluorescent pseudomonad CH31 led to a significant reduction of both the root colonization of cucumber with P aphanidermatum OP4 and the severity of Pythium root rot. In contrast, the fluorescent pseudomonad CHI had no effect on either root colonization oe disease sevenity.

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Fluorescent Pseudomonas isolate E11.3 as biocontrol agent for Pythium root rot in tulips

Cited by 19 publications

References 28 publications

Pathogenicity ofPythium species on cucumber in peat-sand, rockwool and hydroponics

Pathogenicity ofPythium species on cucumber in peat-sand, rockwool and hydroponics

Antagonistic Bacteria Against Schizophyllum Commune Fr. In Peninsular Malaysia

Suppression of Pythium Root Rot of Cucumber by a Fluorescent Pseudomonad s Related to Reduced Root Colonization by Pythium Apbanidermatum

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